Rock crushing machine



Feb. 1, 1955 L. w. JHNSON 2,701,107

ROCK CRUSHING MACHINE Filed May 22, 1950 4 Sheets-Sheet l HI llHlll INVENTOR. 4/ Lou/5 lM JOHNSON Feb. 1, 1955 1.. w. JOHNSON 2,701,107

ROCK CRUSHING MACHINE Filed May 22, 1950 4 Sheets-Sheet 2 Lou/.5 WJJOHA/SO/V IN V EN TOR.

Feb. 1, 1955 w. JOHNSON 2,701,107

ROCK CRUSHING MACHINE Filed Mayr22, 1950 4 Sheets-Sheet 5 INVENTOR. Lou/5 W L/OHNS o/v Feb. 1, 1955 w. JOHNSON 2,701,107

ROCK CRUSHING MACHINE Filed May 22, 1950 4 Sheets-Sheet 4 IN VEN TOR.

United States Patent ROCK CRUSHING MACHINE Louis W. Johnson, Eugene, Oreg.

Application May 22, 1950, Serial No. 163,400

4 Claims. (Cl. 241-140) This invention relates to improvements in rock-crushing machines.

It is one of the principal objects of the invent on to provide a movable crushing jaw similar to a section of a large pillar shaft crusher but which operates in a horizontal plane instead of in a rotary motion in a vert cal plane as heretofore, and which has a roll crushing action on both of its sides or crushing surfaces that starts at the bottom or top of the crushing jaw and proceeds to the opposite edge of the jaw and wherein crushing action overlaps from upper edge of one side of said jaw to lower edge of the other side thereof or vice versa depending on direction of rotation of the actuating shaft.

A further object is to provide a movable crushing jaw with reversible manganese steel cheeks or wear plates and wherein the movement of said jaw is directly toward and away from stationary jaws without rubbing or scuffing motion and thereby prolongs the life of said cheeks or wear plates.

A still further object of the invention is the provision of means for driving the movable jaw at a speed that permits material being crushed to fall approximately twothirds of the distance from point of previous crushing stroke to a point where it would otherwise wedge if the crushing oscillation were slow. This means the movable jaw performs a crushing stroke while moving away and partially returning before striking material falling from the previous stroke. This reduces the stresses on the crusher and also assures that material passing through the parallel crushing zone at the lower edge of the movable and fixed crushing jaws will be reduced to a size determined by closed side, that is when the movable jaw is nearest a fixed jaw.

A still further object of the invention is the provision of a rapidly oscillating live jaw whereby the material is scarcely checked in its fall through the crusher and is not forced to assume a zigzag path of travel as in crushers of cone or gyratory types and I thereby provide a compact machine of much greater capacity than said cone or gyratory types of crushers.

Another object is the provision of a machine of this character wherein each fixed jaw is independently adjustable to permit a wider control of crushed product not available in other crushers to the best of my knowledge.

Another object is the provision of a rock crusher which is of simple, efficient, durable and rugged construction, wherein a minimum amount of vibration is imparted to the supporting structure and wherein by reason of its compact design its several parts are readily accessible for adjustment, repair and replacement.

These and other objects will appear as my invention is more fully hereinafter described in the following specification, illustrated in the accompanying drawings and finally pointed out in the appended claims.

In the drawings:

Figure l is a side elevation of a rock crusher made in accordance with my invention and partly shown in section.

Figure 2 is a top plan view of Figure 1 with a fragment of a driving pulley broken away.

Figure 3 is a sectional side elevation taken along the line 33 of Figure 2.

Figure 4 is a sectional plan view taken along the line 44 of Figure 3.

Figures and 6 are sectional end elevations taken respectively along the lines 5-5 and 6-6 of Figure 3.

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The main body of the invention generally indicated at 1 is a structure having parallel side walls 2 and 3 formed integral with pressure bars 4 and also with feet 5 and 6 at the front and rear ends respectively. Also formed integral with the side walls 2 and 3 is a cylindrical housing 7 for an actuating shaft 8 reduced and shouldered as at 9 for rotatable mounting in roller hearing 10 mounted within each end of the housing 7. Outwardly from each bearing 10 the shaft is formed with eccentric portions 11 and beyond the eccentric portions is reduced in diameter as at 12 and threaded as at 13 to receive a retaining nut 14 which bears against a cone 15 for maintaining a roller bearing 16 in position about the eccentric portion 11 of the shaft. It will be noted that the portion 12 of the shaft is concentric with the central portions 8 and 9. A drive pulley 17 also serving as a balance wheel is keyed or otherwise secured as at 18 to the end portion 12 of the shaft. Surrounding each portion 12 is a collar 19 and between this collar and the retaining nut 14 is an oil seal in the form of a finger ring 20. The bearing 16 is mounted within a cylindrical housing 21 at one end of a pitman generally indicated at 22 and the outer end of the housing is closed by a bearing cap 23 whose inner periphery is sealed with a packing ring 24 disposed within an annular slot formed in the collar 19 to further seal off any escapement of lubricant from the interior of the cylindrical housing 21 within which the bearings 16 are located as aforesaid and to prevent entry of dust. The inner or opposite end of the housing 21 is flanged inwardly as at 25 and the inner periphery of said flange is sealed with a packing ring 26 disposed in an annular groove in a spacer ring 27 whose flange is tapered as at 28. A similar ring 29 surrounds the outer end of the shaft portion 9 and bears against the inner race of the bearings 10 in place within the housing 7 and against the shoulder 9 of the shaft. The rings 27 and 29 are held in place by retaining nut 14 through cone 15 and bearing 16. A bearing cap 30 is secured to housing and its inner periphery is likewise sealed with a pack ng ring to prevent escapement of lubricant from the bearings 10 and entry of dust. To the outer end of each arm 31 of the pitmans 22 I secure by bolts 32 and 33 a aw pivot plate 34 formed with a stub shaft 35 which is ournaled within a cap 36 formed integral with one end of a pivot link 37 whose opposite or bottom end is formed integral with a bearing 38 which fits over a stub shaft 39 extending outwardly from each side of the side walls 2 and 3 of the main body 1. The end of the bearing 38 is closed by a plate 40 containing a felt seal and is held in place by a bolt 41 longitudinally bored and provided with a grease fitting 42 for supplying lubricant by means of a duct or ducts 43 to the interior of the bearing.

The inside of each of the opposing ends of the pitman arms 31 is vertically channeled as at 44 and one wall of each channel is tapered as at 45. By means of these channels the ends of the pitmans are securely united by wedged engagement by means of the bolts 32 and 33 with a movable crusher jaw generally indicated at 46 having two of its parallel marginal edges tapered to correspond with said tapered walls of the channels 44. The crusher jaw as best illustrated in Figures 3, 4 and 5 comprise a main body member 47 having spaced apart internally threaded holes 48 to receive the bolts 32 and 33 as aforesaid. The top edge of the jaw 47 is provided wlth threaded holes 49 to receive bolts 50, by means of which a clamping plate 51 is secured to the top edge of said movable jaw. The top edge of this jaw is protected by a feed divider in the form of a tube 52 extending full length over the top edge of the jaw. Side plates 53 and 54 are secured to the tube 52 by welding or the like as indicated at 55 and which in combination with the tube 52 constitute means for distributing the ingoing rock to be distributed evenly on both sides of the movable jaw and to prevent the incoming rock from striking the top of the movable jaw, the clamping plate and the bolts securing the clamping plate to the jaw. Although I have shown the divider 52 as a tube it is to be understood that a solid bar may be used if desired. The movable jaw is reduced in thickness as at 56 and undercut as at 57 and 58 to receive wear plates 59 and 60 respectively tapered along their bottom edges to fit within the undercut portions 57 and 58 and at their top edges as at 61 to be embraced by the corresponding surfaces of the clamping plate 51.

Pivotally connected as at 62 to the main body of the device is a pair of interconnected arms 63 to whose outer ends is attached or formed integral with a hopper 64 formed integral with a hood 65 for distributing the incoming rock evenly on both sides of the bar 52 and the movable jaw 47. The hopper assembly is provided with a handle or handgrip 66 for convenience in swinging the hopper upwardly about its hinge point 62 to obtain access to the spaces between the movable jaw 47 and the two fixed jaws on opposite sides thereof.

Forwardly and rearwardly of the movable jaw 47 I provide normally fixed jaws 67 and 68 each of which is attached to the upper ends of the side walls 2 and 3 of the main body member by means of a shaft 68A and whose each lower end bears against an abutment in the form of a cast iron safety plate 69 of arcuate formation in cross section whose one edge bears against the bottom end of the stationary jaw and whose opposite edge bears against shims 70 disposed between plates 70A and 70B extending through the side walls 2 and 3 of the main body member. The number of shims determines the setting of the crusher opening.

These fixed jaws are each held against safety plates 69 by eye bolts 71 pivotally attached as at 72 at one of their ends and terminating at their opposite ends within a cylindrical housing 73 Within which is disposed a compression spring 74 whose one end bears against a block 75 and whose opposite end bears against a disc 76 held against the spring by lock nuts 77 so that the spreading shock of any indestructible material between the fixed jaws and which will break the safety plates 69 will be accelerated by the springs 74 in allowing the fixed jaws to move apart to prevent injury to the crusher.

Each fixed jaw is provided with a reversible wear plate 78 secured by a wedge plate 79 and bolts 80 at its top edge and by a tapered edge fitting within an undercut portion 81 at the opposite end of the fixed jaw.

To protect the inner surfaces of the side walls 2 and 3 of the main body between both ends of the fixed jaws 67 and 68 I provide vertical wear plates 82 and 83 formed with handles 84 and 85 respectively at their top edges and whose bottom edges rest upon supports 86 welded or otherwise secured to the side walls 2 and 3 of the main body 1 and whose spaced apart inner edges are parallel as at 87 in conformity with the rectangular slots 88 of the side walls 2 and 3 of the main body within which the movable jaw operates. The bottom ends of the side wear plates 82 lodge within socket blocks 89 secured to both sides of the side members 2 nad 3 near their bottom edges as best shown in Figure 3. The top ends of wear plates 82 and 83 bear against bar 52 and shaft 68.

It is to be noted that the outside or working surfaces of each wear plate 59 and 60 on the movable jaw is formed or curved on a radius extending from the center of the shaft 8 to the farthest wear plate 60 so that said shaft partakes of virtually all the crushing stresses.

While I have shown a particular form of embodiment of my invention, I am aware that many minor changes therein will readily suggest themselves to others skilled in the art without departing from the spirit and scope of the invention. Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A rock crushing machine comprising a substantially rectangular frame having a horizontal base and spaced apart interconnected side walls extending upwardly from the base, a bearing housing extending across one end of said frame between the side walls and spaced above the base, a shaft rotatably mounted within said bearing housing, an eccentric fixed on said shaft near each of its ends, substantially horizontally disposed pitman arms carried by and operably connected at one of their ends to said eccentrics, a pair of normally fixed jaws mounted between the side walls of the frame in spaced upwardly divergent relation to each other and to one side of said shaft, a movable substantially vertical jaw member having crushing surfaces on opposite sides thereof and pivotally and swingably mounted between the fixed jaws, said vertical jaw member being operably connected to the opposite ends of said pitman arms, substantially vertical links pivotally connected to the side walls at one of their ends and pivotally connected at their opposite ends to said movable jaw member substantially midway of its height and means for rotating said shaft.

2. A rock crushing machine as in claim 1 wherein both crushing surfaces of said movable jaw are formed on a radius equal to the distance from the center of said shaft to the crushing surface of said movable jaw farthest removed from said shaft whereby the crushing stresses are at all times passed through the center of said shaft.

3. A rock crushing machine as in claim 1 wherein the lower ends of said fixed jaws bear against adjustable safety plates of arcuate shape in cross section carried by said frame, resilient means carried by said frame above said safety plate and connected to said fixed jaws near their lower ends whereby movement of said fixed jaws upon breakage of said safety plates will be accelerated by said resilient means.

4. A rock crushing machine as in claim 1 including interchangeable wear plates removably secured to said movable jaw, said wear plates being formed on a radius equal to the distance from the center of said shaft to the crushing surface of the wear plate farthest removed from said shaft.

References Cited in the file of this patent UNITED STATES PATENTS 510,800 Kimplen Dec. 12, 1893 1,014,532 Stacks Jan. 9, 1912 1,819,583 Winters Aug. 18, 1931 1,997,214 Guest Apr. 9, 1935 2,028,643 Bakstad Jan. 21, 1936 2,094,465 Peterson Sept. 28, 1937 2,487,744 Waters Nov. 8, 1949 FOREIGN PATENTS 8,386 Great Britain Apr. 21, 1896 429,461 Great Britain May 30, 1935 

